Question
A study was conducted to investigate the effectiveness of a drug in reducing a person’s weight....
A study was conducted to investigate the effectiveness of a drug in reducing a person’s weight. Using the data below calculate the mean d and standard deviation sd of the differences.
A study was conducted to investigate the effectiveness of a drug in reducing a person’s weight. Using the data below calculate the mean d and standard deviation sd of the differences.
| subject | pete | doug | lyn | fred | gill | hank |
| before | 189.9 | 211.3 | 211.5 | 198.1 | 206.3 | 211.6 |
| after | 187.4 | 208.5 | 208.1 | 198.0 | 203.2 | 206.1 |
| difference | 2.5 | 2.8 | 3.4 | 0.1 | 3.1 | 5.5 |
Homework Answers
Answer #1
Difference is given by : 2.5 2.8 3.4 0.1
Sum of difference =8.8
Mean of difference =8.8/4=2.2
Sum of square of difference =
2.5*2.5 + 2.8*2.8 + 3.4*3.4 + 0.1*0.1 = 25.66
Variance =
= 
= 1/4*(25.66-4*2.2*2.2)
= 1.575
Standard deviation is positive square root of variance = squareroot(1.575)
=1.25499
Mean of difference is : 2.2
standard deviation of difference is: 1.25499
If you understood my answer plz rate me positively.
Thanks ?
Not the answer you're looking for?
Similar Questions
A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for randomly...
A study was conducted to investigate the effectiveness of
hypnotism in reducing pain. Results for randomly selected subjects
are given below. At the 1% level of significance, test the claim
that the sensory measurements are lower after hypnotism (scores are
in cm. on a pain scale). Assume sensory measurements are normally
distributed. Note: You do not need to type these values into
Minitab Express; the data file has been created for you.
Before 6.6 6.5 9.0 10.3 11.3 8.1 6.3...
8. A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for...
8. A study was conducted to investigate the effectiveness of
hypnotism in reducing pain. Results for randomly selected subjects
are the following:
Subject A B C D E F G H
Before 6.6 6.5 9.0 10.3 11.3 8.1 6.3 11.6
After 6.8 2.4 7.4 8.5 8.1 6.1 3.4 2.0
The measurements are in centimeters on a pain scale. Higher
values correspond to greater levels of pain. Perform a hypothesis
test to determine if Hypnotism is effective in reducing pain.
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the "before−after"differences. Does hypnotism
appear to be effective in reducing pain?
Before
8.4
7.8
8.4
9.0
12.3
6.9
5.9
2.4
After
6.6
2.9
7.9
8.3...
A study was conducted to measure the effectiveness of hypnotism in reducing pain.The measurements are centimeters...
A study was conducted to measure the effectiveness of
hypnotism in reducing pain.The measurements are centimeters are on
a pain scale before and after hypnosis. Assume that the paired
sample data are simple random samples and that the differences have
a distribution that is approximately normal construct a 95%
confidence interval for the mean of the before – after differences.
Does hypnotism appear to be effective in reducing pain?
Before 8.5 4.5 8.9. 13.1. 8.0. 7.6. 1.6 0.7
After. 6.2....
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the
"beforeminus−after"
differences. Does hypnotism appear to be effective in reducing
pain?
Before
4.9
1.9
10.9
12.1
12.4
10.7
7.6
5.4
After
6.6
2.4
7.3...
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the "before minus−after" differences.
Does hypnotism appear to be effective in reducing pain?
Before 5.6, 2.5, 10.0, 7.9, 7.9, 6.8, 3.2, 6.5
After 6.5, 2.8,...
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the "before minus−after" differences. Does
hypnotism appear to be effective in reducing pain?
Before
9.79.7
6.36.3
8.98.9
9.49.4
11.011.0
11.711.7
5.45.4
6.56.5
After
6.36.3
2.62.6...
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the "before minus−after" differences. Does
hypnotism appear to be effective in reducing pain?
Before
6.7
2.5
6.8
9.3
12.5
11.2
2.9
2.0
After
6.4
2.2...
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are...
A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a 95% confidence interval
for the mean of the "beforeminus−after" differences. Does
hypnotism appear to be effective in reducing pain?
Before
8.48.4
5.25.2
9.59.5
7.17.1
12.612.6
5.05.0
3.43.4
0.20.2
After
6.36.3
2.12.1
7.37.3...
A study was conducted to investigate the effect of a new drug in reducing systolic blood...
A study was conducted to investigate the effect of a new drug in
reducing systolic blood pressure in women. The sample average
systolic blood pressure of 36 women who took the new drug was shown
to be 24 mmHg with a standard deviation of 6 mmHG. The sample
systolic blood pressure of 40 women who took the standard drug was
measured to be 36 mmHG with a standard deviation of 4 mmHG. The
claim is that the new drug will...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 1 minute ago
asked 3 minutes ago
asked 14 minutes ago
asked 15 minutes ago
asked 15 minutes ago
asked 18 minutes ago
asked 57 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago